Year	current US$
1968	67100000
1969	77500000
1970	84400000
1971	96700000
1972	102300000
1973	140300000
1974	241600000
1975	233400000
1976	225500000
1977	245600000
1978	289400000
1979	343300000
1980	395300000
1981	361500000
1982	272300000
1983	292000000
1984	292400000
1985	269500000
1986	276100000
1987	355800000
1988	392300000
1989	459700000
1990	435100000
1991	474300000
1992	546200000
1993	815300000
1994	911400000
1995	956800000
1996	1100200000
1997	1159800000
1998	1299600000
1999	1224400000
2000	1339700000
2001	1248500000
2002	1270800000
2003	1178800000
2004	1167570000
2005	1430800000
2006	1510310000
2007	1691400000
2008	1894800000
2009	1741000000
2010	2456800000
2011	2762800000
2012	2803600000
2013	2637900000
2014	2824900000
2015	3026700000
2016	3228900000
2017	3152200000
2018	3765100000
2019	4086000000
2020	3057600000
2021	4284200000
2022	5770600000
2023	5494600000